OpenSSL Create and Sign Certificate on MAC [El Capitan]

Since I started in IT and Networking, I have discovered that there are many things that result easier to do on a MAC, than any other OS. However we have to give credit where credit is due, Windows is doing a fantastic job with their new OS, but I still prefer MAC ;). This post is dedicated to a paged referred from a colleague at my job on Cisco VCS Expressway configuration: